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M14 image

 

This is an image of M14, one of the bright globular clusters in the Messier list and located about 30K light-years way in the direction of the constellation Ophiuchus. I chose it as a "hurry-up" target right before the start of the summer monsoons in New Mexico.? It¡¯s a very average globular cluster in nearly all respects with one notable exception: it shows a dramatic amount of reddening because of its location near the plane of our galaxy ¨C it has a galactic latitude of only 14 degrees.? This means our line-of-sight to the cluster passes through the substantial amount of dust that's in the galactic disk.? This accounts for the dominant yellow star colors in the image compared to the more typical blue/white appearance of most globular cluster images.? The color balance in the image was done using photometric calibration with foreground stars in order to preserve the reddening effect.?

The image was captured during a single night in June 2024 from SkyPi Remote Observatory using a 12.5" PlaneWave scope and a QSI-640ws camera at f/8 for a final LRGB integration of 4.5 hours.



Thanks for looking,
Bruce W.
 

Beautiful image Bruce!

Marc
 

Thanks, Marc!

Bruce
 

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Hi Bruce,
I've been travelling so just catching up. Lovely image of this cluster, with stars resolved right to the core. Also saw your previous tadpole galaxy image, which was equally very well done.

Geof?

From:[email protected] <[email protected]> on behalf of bw <bw_msg01@...>
Sent:?04 July 2024 21:02
To:[email protected] <[email protected]>
Subject:?[QSI-CCD] M14 image
?
This is an image of M14, one of the bright globular clusters in the Messier list and located about 30K light-years way in the direction of the constellation Ophiuchus. I chose it as a "hurry-up" target right before the start of the summer monsoons in New Mexico.? It¡¯s a very average globular cluster in nearly all respects with one notable exception: it shows a dramatic amount of reddening because of its location near the plane of our galaxy ¨C it has a galactic latitude of only 14 degrees.? This means our line-of-sight to the cluster passes through the substantial amount of dust that's in the galactic disk.? This accounts for the dominant yellow star colors in the image compared to the more typical blue/white appearance of most globular cluster images.? The color balance in the image was done using photometric calibration with foreground stars in order to preserve the reddening effect.?

The image was captured during a single night in June 2024 from SkyPi Remote Observatory using a 12.5" PlaneWave scope and a QSI-640ws camera at f/8 for a final LRGB integration of 4.5 hours.



Thanks for looking,
Bruce W.
 

Very nice.

I love globulars.

So few?images get posted to this group these?days so it's nice to know that QSI's are still out there doing the job. Quality really does matter in the long run despite the break?neck pace of technical innovation.

My QSI690Wsg8?is still going strong after 10 years (fingers crossed) and the small chip works perfectly with my 5 inch refractor.? I have a ASI2600MMPro on a Redcat 71 and an AM5 (which is amazing) but have no intention of changing my CCD to CMOS while it still gets the job done.

Here is an example with M19 taken under Bortle 4 sky at the lofty?height of 294 meters above sea level from my backyard in the Blue?Mountains outside Sydney.



Cheers

Ian

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